Drill bit



FIG. 1 shows the rock drill bit in a front view for percussive drilling.

FIG. 2 shows a side view from the left side of the rock drill bit inFIG. 1.

FIG. 3 shows a side view from the lower side of the rock drill bit inFIG. 1.

FIG. 4 shows a side view from the right side of the rock drill bit inFIG. 1.

FIG. 5 shows a side view from the upper side of the rock drill bit inFIG. 1.

FIG. 6 shows a perspective front view of the rock drill bit forpercussive drilling; and,

FIG. 7 shows a bottom view of the rock drill bit for percussivedrilling.

The broken lines in the drawings depict unclaimed environmental subjectmatter.

The ornamental design for a drill bit, as shown and described.